iospace_default_handler.hpp

00001 #if !defined(__IOSPACE_DEFAULT_HANDLER_HPP__)
00002 #define __IOSPACE_DEFAULT_HANDLER_HPP__
00003 
00004 //
00005 // local includes
00006 //
00007 #include "core/machine/resources/resources.hpp"
00008 #include "core/machine/machine_config.hpp"
00009 #include "iospace_handler.hpp"
00010 
00016 struct iospace_default_handler : public iospace_handler
00017 {
00021     const machine_config &config;
00022 
00023     //
00024     // constructors & destructors
00025     //
00026     inline iospace_default_handler(const machine_config &config)
00027         : config(config)
00028     {}
00029 
00030     //
00031     // port 0x80 sucks ! the Cirrus Logic driver in L4Linux seems to use accesses
00032     //     to this port to slow down graphics operations, so suppress the message.
00033     //     nevertheless we do not sleep instead because L4Linux is slow enough. ;-)
00034     //
00035     virtual inline uint32_t read_ioport(l4_port_t port, access_size access_size)
00036     {
00037         if ((port != 0x80) && config.is(L4VMM_UNUSED_PORT_WARNING)) {
00038             const resource_descriptor *descriptor=resource_descriptor::get(port);
00039             log::warn("reading %s from unused port "l4_port_fmt" (%s)\n",
00040                       access_size.string(), port, descriptor ? descriptor->name : "?");
00041         }
00042 
00043         return INVALID;
00044     }
00045 
00046     virtual inline int write_ioport(l4_port_t port, uint32_t data, access_size access_size)
00047     {
00048         if ((port != 0x80) && config.is(L4VMM_UNUSED_PORT_WARNING)) {
00049             const resource_descriptor *descriptor=resource_descriptor::get(port);
00050             log::warn("writing %s %s to unused port "l4_port_fmt" (%s)\n",
00051                       access_size.string(), format_hex<uint32_t>(data, access_size*2).c_str(),
00052                       port, descriptor ? descriptor->name : "?");
00053         }
00054 
00055         return -L4_ENOTSUPP;
00056     }
00057 };
00058 
00059 #endif
00060 
00061 // ***** end of source ***** //
00062